The Research of Deformation Compensation of the Unloading Mechanism of the Beam for XK-2535 Large-Scale CNC Gantry Milling Machine and Engineering Application

Through the FEM analysis of the unloading wheel and unloading beam in unloading mechanism of the beam by using ANSYS, we obtained the deformation curve of unloading beam under the worst working conditions. The deformation compensation method can be used to manufacture the unloading beam for purpose of improving the machining accuracy. The straightness of guide of beam is up to 0.01mm/1000mm. We obtained that the maximum deformation of unloading wheel was 17.6, the maximum stress was 55.8MPa and the maximum contact stress was 37.5MPa. In order to ensure the security of unloading wheel, the consistency of theoretical result and simulation result were verified by using Hertz contact theory.